Kaolin dyeing sludge geopolymer material and preparation method therefor

A technology of geopolymers, printing and dyeing sludge, applied in cement production and other directions, can solve problems such as environmental hazards and heavy metal enrichment, and achieve the effect of sealing

Active Publication Date: 2015-12-02
JIANGSU GUOHAO REFRACTORY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the disposal method of landfill is relatively common, but it is still quite harmful to the environment; some printing and dyeing sludge with high calorific value is also treated by incineration, but after incineration, heavy metals are enriched in the ash, which becomes a thorny danger. waste

Method used

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  • Kaolin dyeing sludge geopolymer material and preparation method therefor
  • Kaolin dyeing sludge geopolymer material and preparation method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The preparation method of kaolin printing and dyeing sludge geopolymer material of the present invention comprises the following steps:

[0027] (1) Blending 1 part of dried printing and dyeing sludge and 7 parts of kaolin, calcining at 800°C for 3 hours, cooling and grinding to 10-100 μm, to obtain calcined kaolin printing and dyeing sludge cementitious material;

[0028] (2) Mix sodium water glass and sodium hydroxide, control its modulus to 1.5, make a composite activator, and age for 24 hours;

[0029] (3) At a room temperature of 20°C, 5 parts of calcined kaolin printing and dyeing sludge cementitious material and 4 parts of composite activator were stirred evenly to make a slurry;

[0030] (4) The prepared slurry is poured into a mold with a cover to prevent water evaporation, and a geopolymer material of kaolin printing and dyeing sludge is obtained. Its 7-day compressive strength is 32MPa, and its 28d compressive strength is 58MPa. The leaching amount of heavy ...

Embodiment 2

[0032] The preparation method of kaolin printing and dyeing sludge geopolymer material of the present invention comprises the following steps:

[0033] (1) Blending 1 part of dried printing and dyeing sludge and 5 parts of kaolin, calcining at 800°C for 3 hours, cooling and grinding to 10-100 μm, to obtain calcined kaolin printing and dyeing sludge cementitious material;

[0034] (2) Mix sodium water glass and sodium hydroxide, control its modulus to 1.5, make a composite activator, and age for 24 hours;

[0035] (3) At a room temperature of 20°C, 10 parts of calcined kaolin printing and dyeing sludge cementitious material and 9 parts of composite activator were stirred evenly to make a slurry;

[0036] (4) The prepared slurry is poured into a mold with a cover to prevent water evaporation, and a geopolymer material of kaolin printing and dyeing sludge is obtained. Its 7-day compressive strength is 24MPa, and its 28d compressive strength is 47MPa. The leached amount of heavy ...

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Abstract

The invention relates to a kaolin dyeing sludge geopolymer material which comprises a cementing material and a compound activator in a mass ratio of 1:(0.4-1.0); the cementing material is a blended calcined product of kaolin and dried dyeing sludge, wherein the mass ratio of the dried dyeing sludge and kaolin is 1:(3-7); the dried dyeing sludge is the dyeing sludge which is obtained through quenching and high-temperature tempering with lime and ferric salts and drying; the compound activator is prepared from sodium water glass and sodium hydroxide, and the modulus of the compound activator is 1-2. The invention provides an effective path to solve the problems in recycling and utilization of incremental components of the dyeing sludge after chemical quenching and high-temperature tempering and drying, so that the dyeing sludge becomes the geopolymer material rather than a simple filling material, and heavy metal pollutants are sealed.

Description

technical field [0001] The invention relates to a kaolin printing and dyeing sludge geopolymer material and a preparation method thereof, which is a blending calcining process and geopolymer technology, and belongs to the field of inorganic non-metallic materials and solid waste treatment. Background technique [0002] Printing and dyeing sludge is a hazardous waste with complex composition and high content of toxic pollutants. At present, the disposal method of landfill is relatively common, but it is still quite harmful to the environment; some printing and dyeing sludge with high calorific value is also treated by incineration, but after incineration, heavy metals are enriched in the ash, which becomes a thorny danger. waste. Resource utilization is a sustainable method of printing and dyeing sludge disposal. The conventional technical route is to add lime, iron salt, etc. for chemical conditioning and drying, and further prepare it into practical products, such as mixin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24
CPCY02P40/10
Inventor 周何铤
Owner JIANGSU GUOHAO REFRACTORY TECH
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